actually the toughest part is getting the drawing. And with certification questions you only answered what is asked. Anything more could get you a failure. I did that on my 2nds, Added an extra little detail and went from a 20 to a 10 and darn near failed that exam because it was a mandatory.... That would have been embarrassing as every other question answer was dead on.

If you can understand the 6 questions you are going to attempt in 10 minutes, good, you've just gained 20 minutes. Pick the easiest one, do that first. Done it in 10 minutes? great, you gained another 20 minutes. Look at what's left, do the easiest one and so on, and so on til you've attempted or completed 6. Every question has the same value.

Keep your answer to the point and keep it simple. If the question is about pistons, don't write about crankshafts. You might write a 6 page essay on crankshafts, it won't get you any more points, but make a mistake, you will lose them. Your writing must be ledgible and understandable, if I can't understand it, I won't be able to mark it. All, and I mean ALL calculations must be shown. I marked a 1st Class Nav Arc question paper done by a cadet from a college which shall be nameless. The guy was either a whizz kid with a calculator or a cheat, each question was written down carefully on the paper, then the correct answer to the calculations right below it. He couldn't understand it when I failed him and he appealed. The paper was sent to HQ in Ottawa and I never heard any more.

I can't emphasize enough JJ's recommendation about writing down and showing "ALL" your calculations when answering questions that involve a lot of sometimes complicated math. If an error was made that would give an incorrect calculated answer, like transposing a couple of digits of a number when punching numbers into a calculator or in my case misreading a number off a Slide Rule. You will, by doing so, have proven to the examiner that you understand the question along with the process logic & the proper formulas to get the answer asked for in the question. You may then get credit for the question correctly even though the calculated answer was incorrect.

What ever you do don't use "Cook's" Law! That is if you know the answer and "COOK" the middle with garbage that doesn't show correctly how you came up with the answer. That almost guarantee's failure even though the answer was correct!

I thought of another application where an oil pump must be set up supply oil through directional flow control valve assembly. The servo oil pump in any hydraulically actuated governor that operates independent of any other engine systems such as a Woodward PG or UG8 Governor. Where the input shaft on a governor can turn in either direction, is obviously engine driven, and designed to be interchangeable it would be essential to have the pump fitted with some sort of directional control valve assembly. It is not uncommon to have issues with a governor having a sluggish response due to low servo pressure caused by one of the check valves malfunctioning either leaking or damaged.

I found the attached copy of a drawing of a Woodward Servo Oil Pump. The drawing is fairly simple and should be easy to reproduce in an exam